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120502 (1993 QD9)
Classification: Main-belt Asteroid          SPK-ID: 2120502
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1891471354484142 6.1212e-08  
a 2.448383384718619 1.1438e-08 au
q 1.9852786810196 1.4979e-07 au
i 4.666275804921407 6.6043e-06 deg
node 357.902703325543 5.0859e-05 deg
peri 22.26207221400566 5.2457e-05 deg
M 329.4766414312462 1.0214e-05 deg
tp 2459119.144437059875
(2020-Sep-26.64443706)
3.9574e-05 TDB
period 1399.321678358111
3.83
9.8056e-06
2.685e-08
d
yr
n .2572675072270765 1.8028e-09 deg/d
Q 2.911488088417639 1.3601e-08 au
  Orbit Determination Parameters
   # obs. used (total)      501  
   data-arc span      10854 days (29.72 yr)  
   first obs. used      1991-02-08  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57311  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:56:47  

Additional Information
 Earth MOID = .988469 au 
 Jupiter MOID = 2.55777 au 
 T_jup = 3.468 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457740.5 (2016-Dec-18.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1910765451575246 6.138e-08  
q 1.980263370777196 1.5055e-07 au
tp 2457719.676095946373
(2016-Nov-27.17609595)
4.1213e-05 TDB
node 358.0359169561651 5.0798e-05 deg
peri 22.13377188119098 5.2344e-05 deg
i 4.670187035955772 6.6116e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      501  
   data-arc span      10854 days (29.72 yr)  
   first obs. used      1991-02-08  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57311  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:56:47  

Additional Information
 Jupiter MOID = 2.55777 au 
 T_jup = 3.468 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.767537731171332E-15 -9.223663224114661E-15 2.891724044648768E-14 4.131554368876067E-15 2.30127485707813E-14 3.696983187221298E-18
q -9.223663224114661E-15 2.266622175836423E-14 -2.120827957546219E-13 -7.970014697934193E-15 -9.645732614193538E-14 3.510807482607797E-16
tp 2.891724044648768E-14 -2.120827957546219E-13 1.698475429059646E-9 -6.477782187917975E-12 5.320341063760292E-10 -5.137714946586239E-13
node 4.131554368876067E-15 -7.970014697934193E-15 -6.477782187917975E-12 2.580473132716638E-9 -2.572775610893172E-9 1.243485386840504E-10
peri 2.30127485707813E-14 -9.645732614193538E-14 5.320341063760292E-10 -2.572775610893172E-9 2.739897320630085E-9 -1.241037960781176E-10
i 3.696983187221298E-18 3.510807482607797E-16 -5.137714946586239E-13 1.243485386840504E-10 -1.241037960781176E-10 4.371308095191375E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO436582  

120502 (1993 QD9)          Discovered 1993-Aug-20 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1993 QD9 = 2001 VS14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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